Several Muslim-Americans received mysterious robocalls asking them whether they identify as a follower of Islam, some of whom are citing the spectre of a proposed Muslim registry as cause for alarm over the confounding calls.

The Council on Islamic-American Relations, the country's largest civil rights and advocacy group for Muslim-Americans, started flagging social media posts from users who reported receiving the calls this week.

The robocall appear to have gone out in the past two days asking Muslim-Americans their religious affiliation and assuring them the call would "be kept strictly anonymous and confidential," according to a Facebook post by Shamsiya Shervani.

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